Klaviyo: Issue with Time Delays in Flows
Klaviyo's status page listed this on 27 Aug 2026. Lasted 3.6 h, filed against Email Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending and Processing. This is their record, not a measurement of ours.
What happened
Started
Resolved
Lasted3.6 h
What failedEmail Sending, Text Message Sending, WhatsApp Sending, Mobile Push Sending and Processing
Their impactMajor
Regions: their page does not say which. Ours checks from three cities, and the screen we saw is on our own incident pages, where there is one.
What Klaviyo said
On their page: Issue with Time Delays in Flows
Klaviyo's status page: “At 3:25 PM US/Eastern on August 26, 2026, we began experiencing an issue where some profiles are not progressing past time delay actions in flows as expected. This is affecting flow sending across all messaging channels, including email, text messaging, push, and WhatsApp. Message sending from campaigns, and flows that do not include time delay actions are not impacted. We are actively working on a fix. We will continue to provide updates as more information becomes available.”Investigating
Klaviyo's status page: “Our Engineering team has identified the cause of this issue and is working to implement a fix to resolve the remaining impact on sending for flows affected by the time delay issue. Once the fix is rolled out, we will review and repair any impacted flows. We are working to resolve this as quickly as possible and will share another update shortly.”Identified
Klaviyo's status page: “As of 9:30PM US/Eastern, flows have resumed sending as expected across all affected messaging channels. We are processing the backlog of affected flow messages. A fix has been deployed and system performance is improving. We continue to monitor closely and appreciate your patience throughout this incident.”Monitoring
Klaviyo's status page: “As of 11:26 PM US/Eastern on August 26, 2026, the repair to process affected flow messages from the window of impact has been completed, and flow sending has resumed as expected across all channels. We apologize for the disruption this caused. This incident has been resolved.”Resolved
What our own check saw
Nothing of ours failed that day, which is worth knowing: their incident did not reach the parts we check, or we were not checking Klaviyo yet.
Was your store affected?
If you sell through Klaviyo, this is a window worth checking. Bilby walks your store now, tries to buy something, and shows you the screen where it stopped. Free.
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